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4
RESULTS

Media Type
4
movies
Availability
4
Always Available
Year
2
1965
1
1954
1
(No Date)
Topics & Subjects
2
atomic
2
civil defense
1
Atomic Clock
1
Atoms
1
Cesium
1
Clocks
More right-solid
Collection
More right-solid
Creator
1
dept of civil defense
1
nasa; langley research center
1
u s office of civil defense
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